【发布时间】：2014-05-17 12:04:37
【问题描述】：
在过去几个月没有找到合理的ini文件读取方法后，最终决定硬着头皮在Boost中下载、构建和链接。
在创建一个测试项目以查看该过程的工作方式后，我遇到了程序在其中一个选项上引发未知选项异常的问题。这是测试程序的输出以及捕获的错误消息（添加到 try/catch 中以进行正确的错误处理）以及 ini 文件内容和完整代码：
测试 ini 阅读....
按任意键继续。 . .
无法识别的选项“PLAYERDATA.ID”
加载值：
姓名：
ID：8639072
gDiff：
游戏难度值：
遭遇随机性：5.96783e-039
玩家伤害修正：1.20858e-038
计算机损坏修正：127232
项目范围低：-2
物品范围高：8623500
按任意键继续。 . .
settings.ini：
[PLAYERDATA]
NAME = Game1A_g
ID = 12231
GDIFF = Medium
#Difficulty Values
[EASY]
ERAND = 0.25f
PDMOD = 2.12f
CDMOD = 0.65f
IRL = 1
IRH = 10
[MEDIUM]
ERAND = 1.00f
PDMOD = 1.00f
CDMOD = 1.00f
IRL = 1
IRH = 25
[HARD]
ERAND = 1.35f
PDMOD = 0.75f
CDMOD = 1.50f
IRL = 1
IRH = 30
代码：
#include <iostream>
#include <Windows.h>
#include <string>
#include <fstream>
#include "boost/program_options.hpp"
using std::cout;
using std::string;
using std::endl;
using std::ifstream;
namespace gOp = boost::program_options;
struct prgVars
{
string name;
int id;
string gDiff;
float encRand;
float pDMod;
float cDMod;
int iRLow;
int iRHigh;
};
void loadGData(prgVars& pgv);
int main()
{
prgVars pgv;
cout << "Testing ini reading...." << endl;
system("Pause");
loadGData(pgv);
cout << "Loaded values:" << endl;
cout << "Name: " << pgv.name << endl;
cout << "ID: " << pgv.id << endl;
cout << "gDiff: " << pgv.gDiff << endl << endl;
cout << "Game Difficulty Values: " << endl;
cout << "Encounter Randomness: " << pgv.encRand << endl;
cout << "Player Damage Modifier: " << pgv.pDMod << endl;
cout << "Computer Damage Modifier: " << pgv.cDMod << endl;
cout << "Item Range Low: " << pgv.iRLow << endl;
cout << "Item Range High: " << pgv.iRHigh << endl;
system("Pause");
}
void loadGData(prgVars& pgv)
{
gOp::options_description desc("Settings");
desc.add_options()
("PLAYERDATA.NAME",gOp::value<string>(&pgv.name),"player_name"),
("PLAYERDATA.ID",gOp::value<int>(&pgv.id),"player_id"),
("PLAYERDATA.GDIFF",gOp::value<string>(&pgv.gDiff),"game_difficulty");
gOp::variables_map vm;
try
{
ifstream settings_file("settings.ini",ifstream::in);
gOp::store(gOp::parse_config_file(settings_file, desc), vm);
settings_file.close();
gOp::notify(vm);
}
catch (const gOp::error& e )
{
std::cerr << e.what() << std::endl;
}
if (pgv.gDiff == "Easy")
{
gOp::options_description desc("DVars");
desc.add_options()
("EASY.ERAND",gOp::value<float>(&pgv.encRand),"encounter_rate"),
("EASY.PDMOD",gOp::value<float>(&pgv.pDMod),"player_damage_bonus"),
("EASY.CDMOD",gOp::value<float>(&pgv.cDMod),"computer_damage_bonus"),
("EASY.IRL",gOp::value<int>(&pgv.iRLow),"item_rng_low"),
("EASY.IRH",gOp::value<int>(&pgv.iRHigh),"item_rng_high");
gOp::variables_map vm;
ifstream settings_file("settings.ini",ifstream::in);
gOp::store(gOp::parse_config_file(settings_file, desc), vm);
settings_file.close();
gOp::notify(vm);
}
else if (pgv.gDiff == "Medium")
{
gOp::options_description desc("DVars");
desc.add_options()
("MEDIUM.ERAND",gOp::value<float>(&pgv.encRand),"encounter_rate"),
("MEDIUM.PDMOD",gOp::value<float>(&pgv.pDMod),"player_damage_bonus"),
("MEDIUM.CDMOD",gOp::value<float>(&pgv.cDMod),"computer_damage_bonus"),
("MEDIUM.IRL",gOp::value<int>(&pgv.iRLow),"item_rng_low"),
("MEDIUM.IRH",gOp::value<int>(&pgv.iRHigh),"item_rng_high");
gOp::variables_map vm;
ifstream settings_file("settings.ini",ifstream::in);
gOp::store(gOp::parse_config_file(settings_file, desc), vm);
settings_file.close();
gOp::notify(vm);
}
else if (pgv.gDiff == "Hard")
{
gOp::options_description desc("DVars");
desc.add_options()
("HARD.ERAND",gOp::value<float>(&pgv.encRand),"encounter_rate"),
("HARD.PDMOD",gOp::value<float>(&pgv.pDMod),"player_damage_bonus"),
("HARD.CDMOD",gOp::value<float>(&pgv.cDMod),"computer_damage_bonus"),
("HARD.IRL",gOp::value<int>(&pgv.iRLow),"item_rng_low"),
("HARD.IRH",gOp::value<int>(&pgv.iRHigh),"item_rng_high");
gOp::variables_map vm;
ifstream settings_file("settings.ini",ifstream::in);
gOp::store(gOp::parse_config_file(settings_file, desc), vm);
settings_file.close();
gOp::notify(vm);
}
}
【问题讨论】：
标签： c++ exception boost boost-program-options